2. People have reported that Thien Duong is the longest cave in Viet Nam.
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3. People believe the Perfume Pagoda was built during the reign of Le Thanh Tong in the 15th century.
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4. People say Ha Long Bay is one of the most extraordinary natural wonders you will ever see.
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5. People hope many defensive measures will be taken to protect and preserve our man-made wonders.
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6. People believed that the missing boy was wearing a white T-shirt.
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7. People know that Ha Long Bay was recognised as a World Heritage Site by UNESCO in 1994.
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8. People believe that the best time to visit the complex of Hue Monuments is in April.
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